Nim Deathmantle, Dockside Extortionist, and Viscera Seer

Prerequisites

• Nim Deathmantle on the battlefield
• Dockside Extortionist on the battlefield
• Viscera Seer on the battlefield
• Opponents control at least five artifacts and/or enchantments
• available

Steps

1. Activate Viscera Seer by sacrificing Dockside Extortionist
2. When Dockside Extortionist dies, Nim Deathmantle triggers, causing you to pay to return Dockside Extortionist from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. When Dockside Extortionist enters the battlefield, it triggers, creating at least five Treasure tokens
4. Resolve the Viscera Seer ability from step 1, causing you to scry 1
5. Activate four Treasures by tapping and sacrificing them, adding
6. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite scry 1
• Infinite Treasure tokens